 /*******************************************************************************
  * Copyright (c) 2000, 2006 IBM Corporation and others.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
  * which accompanies this distribution, and is available at
  * http://www.eclipse.org/legal/epl-v10.html
  *
  * Contributors:
  * IBM Corporation - initial API and implementation
  *******************************************************************************/
 package org.eclipse.ui.internal.dialogs;

 import org.eclipse.jface.preference.IPreferenceNode;
 import org.eclipse.jface.preference.PreferenceManager;
 import org.eclipse.ui.internal.WorkbenchPlugin;

 /**
  * This class is created to avoid mentioning preferences
  * in this context. Ideally, JFace preference classes should be
  * renamed into something more generic (for example,
  * 'TreeNavigationDialog').
  */

 public class PropertyPageManager extends PreferenceManager {
     /**
      * The constructor.
      */
     public PropertyPageManager() {
         super(WorkbenchPlugin.PREFERENCE_PAGE_CATEGORY_SEPARATOR);
     }

     /**
      * Given a category search he entire tree and add the node. This
      * is to handle the case of categories beyond the first level.
      * @param category
      * @param node
      * @see #addTo(String, PropertyPageNode)
      * @return boolean <code>true</code> if it was added/
      */
     public boolean addToDeep(String category, PropertyPageNode node) {

         return addToDeep(category, node, getRoot());
     }

     /**
      * Given a category search the entire tree and add the node. This
      * is to handle the case of categories beyond the first level.
      * @param category
      * @param node
      * @param top the node to add to if it is found.
      * @see #addTo(String, PropertyPageNode)
      * @return boolean <code>true</code> if it was added somewhere
      */
     public boolean addToDeep(String category, PropertyPageNode node, IPreferenceNode top) {

         IPreferenceNode target = find(category, top);
         if (target != null) {
             target.add(node);
             return true;
         }
         
         IPreferenceNode [] subNodes = top.getSubNodes();
         for (int i = 0; i < subNodes.length; i++) {
             if(addToDeep(category, node, subNodes[i])) {
                 return true;
             }
         }
         
         return false;
     }
 }

